@itchybro would love an explanation mate, I want to get it right from the beginning
ok , i'm talking about the photo period plants not your 2 auto's = they are different
photo period plants require days to be getting longer , as they are right now outdoors in australia to grow (get bigger)
they then need days to start getting shorter for the plant to stop growth & move to making flowers / buds
it's that change from longer days to shorter days indoor growers utilize with there lighting system to mimic growing or flowering
any larger jump from longer light hours like 15 hours your doing indoor to 13 hours outdoor which is the amount of light hours you get at the start of october could & probably would trigger the plant to start bud production ( plant age dependent )
if this was to happen ( triggering flower ) once you moved outdoor the plant would continue to flower outdoor for a while before it realized the day lengths are increasing not decreasing as it would expect to be happening during flowering or bud production
so it would revert back to growing before being triggered again to flower once the days started to shorten
better for plant health to avoid this
i'd suggest if your plants are under 15 hours of lights on indoor your best to move them outdoor when the natural day light is around the same amount , which in this case is the start of december , they will grow through december & january & start flowering some time in feb
there is lots of nuance here that all the guys here could get into but imo this is the basics
also imo many things can stress a plant & all of them you want to try & avoid although not always possible